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Method for precisely measuring ultraviolet light absorber in household product and pretreatment system
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A household product, ultraviolet technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of different and large substrate differences, and achieve the effect of improving accuracy and efficient purification
Active Publication Date: 2020-01-07
GUANGDONG TESTING INST OF PROD QUALITY SUPERVISION
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Problems solved by technology
In terms of detection methods, the detection instruments used in coating products and food contact materials and other products are similar, but due to the very large or even completely different substrates, there are large differences in sample extraction and purification, and it is necessary to develop Targeted pre-treatment methods, testing equipment and testing conditions that meet the requirements of testing equipment
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Embodiment 1
[0070] Such as Figure 1-2 As shown, the pretreatment system for precise determination of ultraviolet absorbers in household products provided by this embodiment includes an extraction and purification integrated test tube 1 and a high-efficiency concentration and enrichment device for concentrating the purified liquid in the extraction and purification integrated test tube 1 2 (that is, the high-efficiency concentration and enrichment device 2 is used to concentrate the purified liquid in the integrated extraction and purification test tube 1). The extraction and purification integrated test tube 1 includes a detachably connected extraction tube 11, a purification column 12 and a purification liquid collection tube 13 (before disassembly, it is shown in Figure A in Figure 1, and after disassembly, it is shown in Figure A). figure 1 Middle B figure), described efficient concentration enrichment device 2 comprises test tube rack 21, is located in the chamber 22 in test tube rac...
Embodiment 2
[0086] Instrument and equipment used in the present invention:
[0087] (1) AB 3200QTRAP liquid chromatography-tandem mass spectrometer;
[0093] (1) Acetonitrile, methanol, ethanol, ethyl acetate, and ammonia water used in the sample extraction process were all analytically pure;
[0094] (2) The acetonitrile, methyl alcohol and formic acid used in the mobile phase are chromatographically pure;
[0095] (3) The water used in the detection process is ultrapure water.
[0096] The solvent-based coating is used as the test sample to illustrate:
[0097] 1. Preprocessing steps
[0098] 1.1 Extraction and purification
[0099] (1) Weigh 0.1 g (accurate to 0.0001 g) of the evenly stirred paint sample and place it in the extract...
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Abstract
The invention discloses a method for precisely measuring an ultraviolet light absorber in a household product and a pretreatment system. The method comprises the following steps: putting the householdcoating product into an extraction tube of an extraction and purification integrated test tube, adding ethyl acetate for dispersion, adding an ammoniation organic reagent for extraction, performing vortex, ultrasonic treatment, centrifugation and the like to obtain an extracting solution, performing purification by using a purification column, performing concentration by using a high-efficiency concentration and enrichment device, dissolving residues by using a formic acid and methanol-acetonitrile mixed solution, performing vortex, performing filtration, collecting a filtrate to obtain a to-be-detected solution, and performing detection by using a liquid chromatography-tandem mass spectrometer. According to the method, pretreatment is simple and rapid, the matrix matching method is adopted, the problem that the qualitative and quantitative properties of the ultraviolet light absorber of the household coating product are inaccurate is solved, and the method is suitable for detection of the household coating product and can also be used as a reference method for detection of the ultraviolet light absorber in other household products. The invention further discloses a pretreatment system which comprises the extraction and purification integrated test tube and the high-efficiency concentration and enrichment device.
Description
technical field [0001] The invention belongs to the technical field of ultraviolet absorbers, and in particular relates to a method and a pretreatment system for precisely measuring ultraviolet absorbers in household products. Background technique [0002] When industrial products such as plastics, paints, rubber, and synthetic fibers are exposed to sunlight or strong fluorescence, they will trigger their own oxidation reaction due to the absorption of ultraviolet energy, resulting in the degradation of the polymer, resulting in defects in the internal structure of the product. The appearance and physical and mechanical properties deteriorate, this process is called photoaging process. Those that can inhibit the above process are called light stabilizers. Adding a light stabilizer to a polymer material, using it to shield or inhibit photoredox or photoaging, has a very significant effect on preventing the aging of the polymer material and prolonging the service life. [00...
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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/08G01N30/02
CPCG01N30/06G01N30/08G01N30/02G01N2030/062
Inventor 陈满英李锦清唐穗平
Owner GUANGDONG TESTING INST OF PROD QUALITY SUPERVISION
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